SMTP stands for Simple Mail Transfer Protocol. It is a protocol used for sending email messages between servers. Most email systems that send mail over the Internet use SMTP to send messages from one server to another, and to deliver messages to local mail clients like Microsoft Outlook or Apple Mail. An SMTP server is a computer that is responsible for sending and receiving email messages. It uses the SMTP protocol to communicate with other email servers, to receive messages from local clients, and to deliver messages to local clients.
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